Piston for pneumatic smokers.



B. A. SHAW.

PISTON FOR PNEUMATIC SMOKERS.

APPLICATION FILED IIIB.2, 1912.

Patented Sept. 29,-1914.

2 BH'EET8SEEET 1.

wi/lmwoeo B. A. SHAW.

PISTON FOR PNEUMATIC SMOKERS.

APPLICATION FILED FEB.2, 1912.

H 2 m own 4 mm E E as e2 b n 6 t a P F 4 0O 3 i 2 1 1 Q 1 avwwwto'c grated; c fiaw witnesses THE NORRIS PETERS 60.. PHOTO-LITHQ. WASHINGTON 0 t.

UNITED STATES PATENT orrion.

nation A. SHAW, or OAK PAR-K, ILLINOIS.

rrsron ron PNEUMATIC sivionnns.

Application filed. February 2, 1912. Serial No. 674,970.

To all whom it may concern:

Be it known that I, BRUCE A. SHAW, a

citizen of the United States, residing at Oak Park, in the county of Cook andState of Illinois, have invented new and useful Improvements in Pistons for Pneumatic Smokers, of which the following is a specification.

The invention has for its general object a hunters or sportsmans smoking device which is so constructed as to inject or force a volume of dense smoke into the den of an animal and against the usual dead air pres Figure 1 is a perspective of the devicev with a part broken away. Fig. 2 is a view looking from the rear of the device with the piston removed. Fig. 3 is a detail partly in section and elevation of the plunger showing by full lines the positions of the parts during the inward movement of the plunger and by dotted lines the positions of the parts during the outward movement of the plunger. Fig. 4 is a detail of one of the smoke generating cartridges preferably employed in connection with my smoker.

The body 5 of the smoker may be formed of any suitable material such as metal, and

may be of any desired contour such as cylindrical. The forward end 6 of the body has a contracted spout or nozzle which is adapted for insertion into the mouth of the den of the animal or for connection to a hose or length of pipe (not shown) whe the den is relatively long or deep. 1

The body 5 is formed in the end portion adjacent to the nozzle 7 with a smoke or gas generating chamber 8 which is adapted to contain any substance found suitable for generating smoke or the like, such as a cartridge 9 shown in detail in Fig. 4,which is made up of rags coated with a compound of sulfur and charcoal. The chamber 8 communicates at one end with an air blast compartment 10 which is also formed with in the body 5 and located in the end portion thereof remote from the forward end 6. This air blast compartment 10 contains an element of suitable construction such as a.

piston o-r plunger 11, which operateswhen moved'ln one dlrectlon to force the air from the compartment and into the smokeichamber 8,where, if the cartridge 9 is ignited,

the air moving through the smoke chamber and toward the nozzle willcommingle with and carry the smokethrough the nozzle 7.

The piston or plunger ll is provided with a packing ring 12 whichin'sures against the escape of air around the periphery of the plunger when the plunger is forced inwardly so that if the inward'movement of the plun i ger be relatively rapid the. ,velocity of the mixture of air and smoke "as itfenters the nozzle, will be increased thereby so that the pressure ordinarily required to produce 34;

quick inward movement of the piston will be sufiicient to cause a relatively long jet or stream of smoke to lssue from thenozzle 7.

The piston orplungerllis hollow andhas a valve l3 which'when the piston is moving inwardly, seals the opening 14 in one end thereof so. as to prevent the passage of airy;

therethrough, but whenthe piston is retracted or moved in the opposite direction the valve unseals the opening 14;, and the lugs 01' teeth 15 on the valve by abutting. the adjacent end of the piston, prevent the valve from sealing the opening 16 and consequently and by reason of permitting air to pass through the openings 14 and. 16 and around the valve, or in other words through the piston, insure against the forming of a partial vacuum in the smoke chamber and air compartment and thus the withdrawing has been injected.

The rod 17 which is suitably connected to the valve 13 such as by clamp nuts 18'18 extends through the cover 19 which is removably secured to the rear end of thebody 5 and held against accidental displacement therefrom by a suitable fastening device such as a stud 20, which interlocks with a bayonet slot 21 in the cover 19. The handle 22 which is formed with or otherwise suit.- ably connected to the outer end of the rod affords a grip for the hand of the operator which operates the piston or plunger. The

body portion 24 of the cover 19 which forms .a stop for the inward movement of the 0f the smoke from the place into which it handle 22, has one or more openings 25 which form passages for any air which might be moved toward the head or cover duringthe outward movement of the piston and, thus insure against compression by such outward movement and warrant unhampered 'outwardmovement of the piston,

barring,'of course, such resistance as is offered to this outward movement by the triotion of the periphery of the piston and the wall of the compartment 10.

A screen 26 at the inner end of the nozzle 7 permits of the passage of the mixed gases therethrough, but prevents the falling of the gas or smoke generating substance out of the chamber when the body extends vertically downward. The apertured wall 27 between the chamber 8 and air compartment "10 also prevents the falling of the cartridge into the said compartment when the body is pointed verticallyvupward.

Although I have shown and described one embodiment of my invention it is to be understood that I am not to be limited to the specific arrangement and construction of parts since various changes may be made, within the scope of the appended claims without departing from the spirit or sacriwalls and of materially less diameter than the similar dimension of the casing, and a plunger operating rod connected directly to the valve strip, said valve strip being formed with'projections arranged at an angle to one surface adapted in movement of the strip in one direction to engage the inner surface of one of the walls 01 the casing to maintain the valve strip in spaced relation to such wall, said casing being formed for the reception of edge packing.

2. A plunger for pneumatic smokers including a hollow casing comprising spaced parallel walls, each formed with an opening, a valve strip freely movable between the walls and of materially less diameter than the similar dimension of the casing, and a plunger operating rod connected directly to the valve strip, said valve strip being formed with projections arranged at an angle to one surface adapted in movement of the strip in one direction to engage the inner surface of one of the walls of the casing to maintain the valve strip in spaced relation to such wall, said valve strip serving as a means for connecting the casing and plunger rod to permit said rod to move the casing subsequent to the limit movement of the valve strip in either direction.

In testimony whereof I aflix my signature in presence of two witnesses.

BRUCE A. SHAW. Witnesses ADA S. KRINGEL, PAUL C. STAATS.

06 51550: this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

